Internal tension member of inflatable product, manufacturing apparatus and method therefor, and inflatable product

Abstract

Disclosed is an apparatus for manufacturing an internal tension member of an inflatable product, the apparatus comprising: a support frame; a base plate arranged to pass through the inside of the support frame; a base strip conveying device comprising two inner base strip reels, two outer base strip reels and a traction wheel which are used for continuously supplying base strips, the traction wheel pulling four base strips to continuously move; a wire winding device comprising a rotation device arranged around the base plate and wire winding guide shafts symmetrically arranged on two sides of the base plate, the rotation device winding a wire on two inner base strips in a rotating manner; and a welding device positioned between the wire winding device and the traction wheel, the welding device respectively welding the two inner base strips to the corresponding two outer base strips. Further disclosed are a method for manufacturing an internal tension member of an inflatable product, an internal tension member of an inflatable product, and an inflatable product.

What is claimed is: 
     
         1 . An apparatus for manufacturing a tension member, the apparatus comprising:
 a support frame;   a base plate having a size which fits within an inside of the support frame;   a base strip conveyor comprising: two inner base strip reels, two outer base strip reels, and a traction wheel;   a wire winder comprising: a rotation device disposed around the base plate, and wire winding guide shafts symmetrically arranged with respect to the base plate; and   a welder positioned between the wire winding device and the traction wheel.   
     
     
         2 . The apparatus according to  claim 1 , wherein a distance between an upper surface of the base plate and a lower surface of the base plate is one of constant and adjustable. 
     
     
         3 . The apparatus according to  claim 2 , wherein at least one of the wire winding guide shafts is moveable with respect to another of the wire winding guide shafts 
     
     
         4 . The apparatus according to  claim 2 , wherein the base strip conveyor further comprises at least one inner base strip tension wheel adapted to the two inner base strip reels and at least one outer base strip tension wheel adapted to the two outer base strip reels. 
     
     
         5 . The apparatus according to  claim 1 , wherein the rotation device comprises a ring-shaped rotary table and a plurality of spools, wherein the ring-shaped rotary table comprises a plurality of uniformly spaced wire-outlet heads disposed on a circumference thereof, each of the plurality of wire-outlet heads corresponding to one of the plurality of spools. 
     
     
         6 . The apparatus according to  claim 1 , wherein the apparatus further comprises a cutoff device arranged on an output end of the traction wheel. 
     
     
         7 . A manufacturing apparatus comprising:
 a support frame;   a base plate configured to pass through an inside of the support frame;   a base strip conveying device comprising: a first inner base strip reel configured to supply a first inner base strip, a second inner base strip reel configured to supply a second inner base strip, a first outer base strip reel configured to supply a first outer base strip, a second outer base strip reel configured to supply a second outer base strip, and a traction wheel configured to tension each of the first inner base strip, the second inner base strip, the first outer base strip, and the second outer base strip;   a wire winding device comprising: a rotation device configured to wind a wire around the base plate, and a plurality of wire winding guide shafts, symmetrically arranged with respect to the base plate and each configured to guide the wire around the base plate; and   a welding device configured to weld the first inner base strip to the first outer base strip and to weld the second inner base strip to the second outer base strip.   
     
     
         8 . A method for manufacturing a tension member, the method comprising:
 conveying, in parallel, a first inner base strip and a second inner base strip to a wire winding device;   winding a wire around the first inner base strip and the second inner base strip;   conveying, in parallel, a first outer base strip and a second outer base strip, such that the first outer base strip faces the first inner base strip and the second outer base strip faces the second inner base strip; and   welding the first outer base strip to the first inner base strip and welding the second outer base strip to the second inner base strip.   
     
     
         9 . The method according to  claim 8 , further comprising adjusting a size of a circumference of the winding of the wire. 
     
     
         10 . An internal tension member of an inflatable product, the internal tension member comprising:
 a first tension part comprising a first inner base strip and a first outer base strip;   a second tension part, spaced apart from the first tension part and comprising a second inner base strip and a second outer base strip; and   a wound element comprising a wire wound in a spiral manner around the first inner base strip and the second inner base strip;   wherein the first inner base strip and the first outer base strip are welded together with first portions of the wire therebetween, and the second inner base strip and the second outer base strip are welded together with second portions of the wire therebetween.   
     
     
         11 . The internal tension member according to  claim 10 , wherein the first tension part is substantially parallel to the second tension part, and a pitch at which the wire is wound around the first inner base strip and the second inner base strip is even. 
     
     
         12 . An inflatable product, comprising:
 a first sheet;   a second sheet spaced apart from the first sheet; and   the internal tension member according to  claim 10 ,   wherein the first outer base strip is connected to the first sheet and the second outer base strip is connected to the second sheet.   
     
     
         13 . The inflatable product according to  claim 12 , further comprising:
 at least one auxiliary sheet comprising:
 a first side part and a second side part connected to one of the first sheet and the second sheet, and 
 a central region, disposed between the first side part and the second side part and connected to one of the first outer base strip and the second outer base strip. 
   
     
     
         14 . The inflatable product according to  claim 12 , wherein:
 the first outer base strip is welded to the first sheet such that a welding mark thereof is one of a closed ring and a line;   the second outer base strip is welded to the second sheet such that a welding mark thereof is one of a closed ring and a line; and   the internal tension member comprises a plurality of internal tension members arranged in a lattice manner in the inflatable product.   
     
     
         15 . The inflatable product according to  claim 12 , wherein each of the first material sheet, the second sheet, the first tension part, and the second tension part comprises one of polyvinyl chloride and thermoplastic polyurethane elastomer. 
     
     
         16 . The inflatable product according to  claim 15 , wherein the inflatable product comprises one of an inflatable mattress, an inflatable spa, and an inflatable surfboard.